It has a true bypass and a LOAD BOX mode to disconnect the speaker, and use the output line for monitoring or recording. Output controlled by a volume knob.
Caution: Two models are available : 4,8 and 16 ohms.
Moreover, this attenuator is only for amplifiers with a maximum power of 50 w.It does not require power supply.
Like most of our products, it is hand wired point to point (no circuit board).
Dimension : 15*12*6cm